CN217562664U

CN217562664U - Full-immersion liquid-cooling battery module

Info

Publication number: CN217562664U
Application number: CN202222249382.4U
Authority: CN
Inventors: 杨书廷; 牛祥超; 李垒; 李秋洋
Original assignee: Henan Power Battery Innovation Center Co ltd; Battery Research Institute Of Henan Co ltd
Current assignee: Henan Power Battery Innovation Center Co ltd; Battery Research Institute Of Henan Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-10-11
Anticipated expiration: 2032-08-26

Abstract

The utility model discloses a full-immersion liquid-cooled battery module, which comprises an airtight box body and a soft-packaged battery cell, wherein the soft-packaged battery cell is stacked into a plurality of battery cell combinations which are mutually parallel from front to back in the box body, the battery cell combinations are immersed in cooling liquid, and a partition plate is arranged between two adjacent battery cell combinations; runners for flowing of cooling liquid are respectively arranged on the lower box cover, the front baffle, the upper box cover, the rear baffle and the partition plate of the box body and are communicated with each other; the front end of the lower box cover is provided with a liquid inlet communicated with the flow channel, and the upper end of the rear baffle is provided with a liquid outlet communicated with the flow channel. The utility model discloses a full immersion liquid cooling battery module sets up the baffle between the adjacent electric core combination in the box, and be provided with the runner that the coolant liquid flows respectively on case lid, preceding baffle, last case lid, backplate and in the baffle down, makes the coolant liquid in the box form organized flow, and the temperature in the box is more balanced, avoids going out the heat exchange dead angle, has realized the more balanced autonomic accuse temperature of battery module.

Description

Full-immersion liquid-cooling battery module

Technical Field

The utility model belongs to the power battery field especially relates to a full immersion liquid cooling battery module.

Background

The current power battery has poor adaptability to low-temperature environment and high-temperature environment, the temperature of a power battery pack which is kept still in the low-temperature environment for a long time is lower than the working temperature of the battery, and the power battery pack needs to be heated to the allowable working temperature of the battery before starting; the power battery pack in the high-temperature environment needs to be cooled in the rapid charging process so as to prevent the rapid temperature rise of the battery pack in the charging process from causing thermal runaway, and therefore, the improvement of the adaptability of the power battery to the temperature is very important. In addition, the too big meeting of the inside difference in temperature of battery module leads to each electric core operating condition inconsistent to reduce the uniformity of electric core, shorten whole power battery's life-span, consequently promote the inside each electric core temperature equilibrium of battery module and just seem very important. The full-immersion liquid-cooling battery module is formed by immersing each battery cell of the battery module in non-combustible cooling liquid, and the control and the balance of the temperature of each battery cell are realized through the heat exchange between the cooling liquid and each battery cell. But the mobility of cooling liquid is not good among the full immersion liquid battery module among the prior art, and the difference in temperature between the electric core is big, and temperature control effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the utility model provides a full immersion liquid cooling battery module, its cooling liquid's mobility is good, and the difference in temperature between the electric core is little, and temperature control effect is good.

The technical scheme of the utility model is that:

a full-immersion liquid-cooled battery module comprises a closed box body and a soft-package battery cell, wherein the soft-package battery cell is stacked into a plurality of battery cell combinations which are mutually parallel from front to back in the box body, the battery cell combinations are immersed in cooling liquid, and a partition plate is arranged between every two adjacent battery cell combinations; the lower box cover, the front baffle, the upper box cover, the rear baffle and the partition plate of the box body are respectively provided with a flow passage for flowing of cooling liquid and are communicated with each other; the front end of the lower box cover is provided with a liquid inlet communicated with the flow channel, and the upper end of the rear baffle is provided with a liquid outlet communicated with the flow channel.

Preferably, the flow channel is provided with a gap, and the cooling liquid inside and outside the flow channel can seep into each other.

Preferably, the lower box cover is provided with a lower transverse flow distribution channel, a plurality of lower longitudinal channels and a plurality of lower transverse channels; the lower transverse shunting runner is transversely arranged at the front end of the lower box cover, and the liquid inlet is arranged on the lower transverse shunting runner; the lower longitudinal runners are longitudinally arranged in parallel and are communicated with the lower transverse flow distribution runner, the lower transverse runners are arranged on the lower box cover in parallel, and the lower transverse runners are communicated with the lower longitudinal runners; the front baffle is vertically arranged at the front end of the lower box cover, a plurality of front upper liquid flow channels are arranged on the front baffle, and each front upper liquid flow channel is communicated with the lower transverse flow distribution channel; the upper box cover is provided with an upper transverse flow distribution runner, a plurality of upper longitudinal runners and a plurality of upper transverse runners; the upper transverse flow dividing channel is transversely arranged at the front end of the upper box cover and is communicated with the front upper liquid flow channel; the upper longitudinal runners are longitudinally arranged on the upper box cover and are communicated with the upper transverse flow distribution runners; the upper transverse runners are transversely arranged in parallel, and the upper transverse runners are communicated with the upper longitudinal runners; a partition plate upper liquid flow passage is arranged on the partition plate, the lower end of the partition plate upper liquid flow passage is communicated with the lower transverse flow passage, and the upper end of the partition plate upper liquid flow passage is communicated with the upper transverse flow passage; the rear baffle is provided with a confluence flow channel communicated with the liquid outlet, and the confluence flow channel is communicated with the lower longitudinal flow channel and the upper longitudinal flow channel.

Preferably, the lower transverse flow-dividing channel, the lower longitudinal channel, the lower transverse channel, the front upper liquid channel, the upper transverse flow-dividing channel, the upper longitudinal channel and the upper transverse channel are channels with seepage gaps; the liquid feeding flow channel of the partition plate and the confluence flow channel are sealed flow channels.

Preferably, the upper box cover comprises an upper cover plate and an upper bottom plate which are hermetically covered with each other; the upper cover plate is provided with a cover plate transverse splitter box, a cover plate left longitudinal groove, a cover plate middle longitudinal groove and a cover plate right longitudinal groove, and the upper bottom plate is provided with a transverse clamping groove for clamping the partition plate;

after the upper bottom plate and the upper cover plate are sealed and covered, the upper transverse diversion channel is formed at the position of the transverse diversion groove of the cover plate, and a plurality of upper longitudinal channels are respectively formed at the position of the left longitudinal groove of the cover plate, the position of the middle longitudinal groove of the cover plate and the position of the right longitudinal groove of the cover plate; the upper transverse flow channel is formed at the position of the transverse clamping groove.

Preferably, an inclined bulge is arranged on the upper base plate, and after the upper base plate and the upper cover plate are sealed and covered, the bulge is connected between two adjacent upper longitudinal flow channels, so that the two adjacent upper longitudinal flow channels are communicated at two side edges of the bulge.

The utility model has the advantages that:

the utility model discloses a full immersion liquid cooling battery module sets up the baffle between the adjacent electric core combination in the box to be provided with the runner that the coolant liquid flows on lower case lid, preceding baffle, last case lid, the backplate of box and on the baffle respectively, make the coolant liquid in the box form organized flow, the temperature in the box is more balanced, avoids appearing the heat exchange dead angle, has realized the more balanced autonomic accuse temperature of battery module.

Drawings

Fig. 1 is the structural schematic diagram of the fully-immersed liquid-cooled battery module of the present invention.

Fig. 2 is an exploded view of the structure of fig. 1.

Fig. 3 is the assembly schematic diagram of the upper case cover, the lower case cover, the front baffle, the rear baffle and the partition plate in the full-immersion liquid-cooled battery module of the utility model.

Fig. 4 is a schematic view showing the flow passages in fig. 3 communicating with each other.

Fig. 5 is a schematic structural view of the upper cover plate.

Fig. 6 is a bottom view of fig. 5.

Fig. 7 is a schematic structural view of the upper base plate.

In the figure: 1. a lower box cover; 11. a liquid inlet; 12. a lower transverse flow-dividing channel; 13. a lower longitudinal runner; 14. a lower transverse flow passage; 2. a front baffle; 21. a front upper liquid flow passage; 3. an upper box cover; 31. an upper transverse flow-dividing channel; 32. an upper longitudinal flow passage; 33. an upper transverse runner; 34. an upper cover plate; 341. a cover plate transverse shunting groove; 342. a cover plate left longitudinal slot; 343. a longitudinal groove in the middle of the cover plate; 344. a cover plate right longitudinal slot; 35. An upper base plate; 351. a transverse clamping groove; 352. a protrusion; 4. a tailgate; 41. A confluence flow channel; 42. a liquid outlet; 5. a partition plate; 51. a partition upper liquid flow channel; 6. and (6) combining the battery cores.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a fully-immersed liquid-cooled battery module according to the present invention, and fig. 2 is an exploded structural view of fig. 1.

As shown in fig. 1 and 2, the full immersion liquid cooling battery module of the present invention includes a sealed box and a soft package battery cell, wherein the soft package battery cell is stacked into a plurality of battery cell combinations 6 which are parallel to each other from front to back in the box, the battery cell combinations 6 are immersed in a cooling liquid, and a partition plate 5 is disposed between two adjacent battery cell combinations 6; the lower box cover 1, the front baffle plate 2, the upper box cover 3, the rear baffle plate 4 and the partition plate 5 of the box body are respectively provided with a flow passage for flowing of cooling liquid and are communicated with each other; the front end of the lower box cover 1 is provided with a liquid inlet 11 communicated with the flow channel, and the upper end of the rear baffle 4 is provided with a liquid outlet 42 communicated with the flow channel. Fig. 3 is the assembly structure schematic diagram of the upper box cover 3, the lower box cover 1, the front baffle 2, the rear baffle 4 and the partition 5 in the full-immersion liquid-cooled battery module of the utility model, and fig. 4 is the schematic diagram of the mutual communication of the flow channels in fig. 3.

The working principle is as follows:

the utility model discloses a soak in the liquid cooling battery module entirely a plurality of electric core combinations 6 that are piled up by soft electricity electric core and soak in the coolant liquid, simultaneously, the lower case lid 1, preceding baffle 2, the last case lid 3, the backplate 4 of box and be provided with the runner that is used for that the coolant liquid flows, communicates each other on the baffle 5 respectively. When the temperature of the battery cell needs to be adjusted before starting, the cooling liquid is introduced from the liquid inlet 11, the cooling liquid flows through the lower box cover 1, the front baffle 2, the upper box cover 3, the flow channels arranged in the baffle 5 and the rear baffle 4 and flows out from the liquid outlet 42, the flow path of the cooling liquid covers the upper plane and the lower plane of the battery cell combination and the space between two adjacent battery cell combinations 6, the cooling liquid flowing in the flow channels and the cooling liquid soaked by the battery cell combinations 6 outside the flow channel in the box body carry out sufficient heat exchange, so that the working environment temperature of the whole soft package battery cell in the box body is kept relatively balanced, and an organized flow path is planned for the flow of the cooling liquid by using the flow channels, so that the imbalance of the internal temperature of the box body caused by poor flowability due to the fact that the cooling liquid soaked by only using the battery cell combinations 6 is prevented. The utility model discloses an among the full immersion liquid cooling battery module, inlet 11 and liquid outlet 42 set up respectively in the front lower place and the back upper place of box, more are favorable to the heat exchange of cooling liquid, avoid the production at heat exchange dead angle.

Preferably, the flow channel is provided with a gap, and the cooling liquid inside and outside the flow channel can seep into each other. The gap is arranged on the flow channel, so that the cooling liquid inside and outside the flow channel can mutually seep, the cooling liquid for soaking the battery cell combination outside the flow channel can also partially participate in circulation, and the temperature in the box body can be more uniform under the flowing of the cooling liquid.

Fig. 3 is the assembly schematic diagram of upper box cover, lower box cover, preceding baffle, backplate and baffle in the full immersion liquid cooling battery module of the utility model, fig. 4 is the schematic diagram that communicates each other of runner in fig. 3, fig. 5 is the structural schematic diagram of upper cover plate, fig. 6 is the bottom view of fig. 5, fig. 7 is the structural schematic diagram of upper plate.

Preferably, as shown in fig. 3 and 4: a lower transverse flow dividing channel 12, a plurality of lower longitudinal channels 13 and a plurality of lower transverse channels 14 are arranged on the lower box cover 1; the lower transverse diversion flow channel 12 is transversely arranged at the front end of the lower box cover 1, and the liquid inlet 11 is arranged on the lower transverse diversion flow channel 12; the lower longitudinal runners 13 are longitudinally arranged in parallel and are communicated with the lower transverse diversion runner 12, the lower transverse runners 14 are arranged on the lower box cover 1 in parallel, and the lower transverse runners 14 are communicated with the lower longitudinal runners 13; the front baffle 2 is vertically arranged at the front end of the lower box cover 1, a plurality of front upper liquid flow channels 21 are arranged on the front baffle 2, and each front upper liquid flow channel 21 is communicated with the lower transverse diversion flow channel 12; the upper box cover 3 is provided with an upper transverse flow dividing runner 31, a plurality of upper longitudinal runners 32 and a plurality of upper transverse runners 33; the upper transverse flow dividing channel 31 is transversely arranged at the front end of the upper box cover 3 and communicated with the front upper liquid flow channel 21; a plurality of upper longitudinal runners 32 are longitudinally arranged on the upper box cover 3 and are communicated with the upper transverse diversion runners 31; the upper transverse flow channels 33 are transversely arranged in parallel, and the upper transverse flow channels 33 and the upper longitudinal flow channels 32 are communicated with each other; a partition plate upper liquid flow passage 51 is arranged on the partition plate 5, the lower end of the partition plate upper liquid flow passage 51 is communicated with the lower transverse flow passage 14, and the upper end of the partition plate upper liquid flow passage 51 is communicated with the upper transverse flow passage 33; the rear baffle 4 is provided with a confluence flow channel 41 communicated with the liquid outlet 42, and the confluence flow channel 41 is communicated with the lower longitudinal flow channel 13 and the upper longitudinal flow channel 32.

The utility model discloses an after the preferred above-mentioned scheme of full immersion fluid battery module, at the during operation, the coolant liquid flows into down from inlet 11 and shunts after in the horizontal reposition of redundant personnel runner 12, then gets into respectively under each in the liquid runner 21 of going up before vertical runner 13 and each. The pressure of the cooling liquid in the liquid inlet 11 is usually 15kPa-20kPa, and the height of the partition 5 is about 160mm to ensure proper liquid pressure in each flow passage. The coolant entering the front upper liquid flow passage 21 flows into the upper transverse flow dividing passage 31, then is divided into the upper longitudinal flow passages 32, and then flows out through the liquid outlet 42. A part of the cooling liquid entering each lower longitudinal flow passage 13 flows along the lower longitudinal flow passage 13 to the confluence flow passage 41 and then flows out through the liquid outlet 42; the other part of the liquid flows to the upper transverse flow passage 33 through the upper liquid flow passage 51 on each partition plate 5 after being divided to flow to each lower transverse flow passage 14 passing through in the process of flowing along the lower longitudinal flow passage 13, then flows into the upper longitudinal flow passage 32, and then flows out from the liquid outlet 42. In the above-mentioned coolant liquid flow in-process, be located the coolant liquid in the baffle runner on the baffle 5 between each electric core combination 6 and force the flow organically, in time the position between each electric core combination 6 carries out the heat exchange, adjust each electric core combination 6's operating temperature, the stagnant flow that the coolant liquid of the usefulness of soaking of having avoided no flow direction guide produces here is static even, the unanimity of box inside temperature has been ensured, especially the power battery of large capacity, the battery box is great, the position between the electric core combination 6 often is the worst position of heat exchange in closing soaking liquid cooling battery module, the technical scheme of the utility model can make and obtain effectual heat exchange between each electric core combination 6, the uniformity of each electric core electrical property performance in the guarantee battery.

Preferably, the lower transverse flow-dividing channel 12, the lower longitudinal channel 13, the lower transverse channel 14, the front upper liquid channel 21, the upper transverse flow-dividing channel 31, the upper longitudinal channel 32 and the upper transverse channel 33 are channels with seepage gaps; the separator upper liquid flow path 51 and the confluence flow path 41 are sealed flow paths. Therefore, enough pressure can be ensured in the partition board upper liquid flow passage 51 and the confluence flow passage 41 to promote the cooling liquid to flow from bottom to top quickly, and particularly, relatively high flow rate and high heat exchange efficiency can be kept in the partition board upper liquid flow passage 51, which is more favorable for the uniformity of the temperature among the battery cell combinations 6 in the box body.

Preferably, as shown in fig. 1, 3, 5, 6 and 7, the upper case cover 3 includes an upper cover plate 34 and an upper bottom plate 35 which are hermetically covered with each other; the upper cover plate 34 is provided with a cover plate transverse shunting groove 341, a cover plate left longitudinal groove 342, a cover plate middle longitudinal groove 343 and a cover plate right longitudinal groove 344, and the upper bottom plate 35 is provided with a transverse clamping groove 351 for clamping the partition plate 5; after the upper bottom plate 35 and the upper cover plate 34 are hermetically covered, the upper transverse diversion flow channel 31 is formed at the position of the cover plate transverse diversion groove 341, and a plurality of upper longitudinal flow channels 32 are respectively formed at the position of the cover plate left longitudinal groove 342, the position of the cover plate middle longitudinal groove 343 and the position of the cover plate right longitudinal groove 344; the lateral notches 351 are positioned to form the upper lateral flow passage 33. The upper cover plate 34 and the upper bottom plate 35 which are in the structure are covered to form the upper box cover 3, only corresponding grooves are needed to be manufactured during manufacturing, and after the upper cover plate and the upper bottom plate are buckled, a proper gap is generated, so that mutual seepage of cooling liquid inside and outside a flow channel is facilitated, and the gap does not need to be specially manufactured. Each flow channel plays a role in guiding the flow of liquid, a certain flow direction of cooling liquid is guaranteed, heat exchange dead angles caused by local stagnation can be avoided, the liquid in the box body is always in a disturbed state due to mutual seepage of cold liquid inside and outside the flow channel in the other direction, and heat exchange is more sufficient. Moreover, the upper box cover 3 formed by covering the upper cover plate 34 and the upper bottom plate 35 is of a double-layer structure, is firmer and can effectively control the deformation of the box body at high temperature. The lower case cover 1 may have the same structure as the upper case cover 3.

Preferably, as shown in fig. 7, an inclined protrusion 352 is disposed on the upper bottom plate 35, and after the upper bottom plate 35 and the upper cover plate 34 are sealed and covered, the protrusion 352 is connected between two adjacent upper longitudinal flow channels 32, so that two adjacent upper longitudinal flow channels 32 are communicated at two side edges of the protrusion 352. By providing the inclined protrusion 352 on the upper base plate 35, the liquid flow between the upper longitudinal flow channels 32 is formed on the upper base plate 35, so that a flow plane of the cooling liquid is formed on the entire surface of the upper base plate 35, the heat exchange area of the cooling liquid is increased, and the cooling liquid between the upper longitudinal flow channels 32 flows mutually, thereby further increasing the uniformity of the temperature.

It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the individual features of the invention described above can be combined with one another as long as they do not conflict with one another. In addition, the above embodiments are only some embodiments, not all embodiments, and all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention based on the embodiments of the present invention.

Claims

1. A full-immersion liquid-cooled battery module comprises a closed box body and a soft-packaged battery cell, wherein the soft-packaged battery cell is stacked into a plurality of battery cell combinations which are mutually parallel from front to back in the box body, and the battery cell combinations are immersed in cooling liquid; the lower box cover, the front baffle, the upper box cover, the rear baffle and the partition plate of the box body are respectively provided with a flow channel for flowing of cooling liquid and are communicated with one another; the front end of the lower box cover is provided with a liquid inlet communicated with the flow channel, and the upper end of the rear baffle is provided with a liquid outlet communicated with the flow channel.

2. The fully-immersed liquid-cooled battery module as recited in claim 1, wherein the flow channel has a gap, and the cooling liquid inside and outside the flow channel can flow through the gap.

3. The full-immersion liquid-cooled battery module of claim 1, wherein the lower cover has a lower transverse flow manifold, a plurality of lower longitudinal flow channels, and a plurality of lower transverse flow channels; the lower transverse shunting runner is transversely arranged at the front end of the lower box cover, and the liquid inlet is arranged on the lower transverse shunting runner; the lower longitudinal runners are longitudinally arranged in parallel and are communicated with the lower transverse flow distribution runners, the lower transverse runners are arranged on the lower box cover in parallel, and the lower transverse runners are communicated with the lower longitudinal runners; the front baffle is vertically arranged at the front end of the lower box cover, a plurality of front upper liquid flow channels are arranged on the front baffle, and each front upper liquid flow channel is communicated with the lower transverse flow dividing channel; the upper box cover is provided with an upper transverse flow distribution channel, a plurality of upper longitudinal channels and a plurality of upper transverse channels; the upper transverse flow dividing channel is transversely arranged at the front end of the upper box cover and is communicated with the front upper liquid flow channel; the upper longitudinal runners are longitudinally arranged on the upper box cover and are communicated with the upper transverse flow distribution runners; the upper transverse runners are transversely arranged in parallel, and the upper transverse runners are communicated with the upper longitudinal runners; a partition plate upper liquid flow passage is arranged on the partition plate, the lower end of the partition plate upper liquid flow passage is communicated with the lower transverse flow passage, and the upper end of the partition plate upper liquid flow passage is communicated with the upper transverse flow passage; the rear baffle is provided with a confluence flow channel communicated with the liquid outlet, and the confluence flow channel is communicated with the lower longitudinal flow channel and the upper longitudinal flow channel.

4. The fully-immersed liquid-cooled battery module as recited in claim 3, wherein the lower transverse shunting runner, the lower longitudinal runner, the lower transverse runner, the front upper liquid runner, the upper transverse shunting runner, the upper longitudinal runner, and the upper transverse runner are runners with percolation slits; the liquid feeding channel and the confluence channel on the partition plate are sealed channels.

5. The full immersion liquid cooled battery module of claim 3, wherein the upper cover includes an upper cover plate and an upper base plate that are sealingly closed to each other; the upper cover plate is provided with a cover plate transverse splitter box, a cover plate left longitudinal groove, a cover plate middle longitudinal groove and a cover plate right longitudinal groove, and the upper bottom plate is provided with a transverse clamping groove for clamping the partition plate; after the upper bottom plate and the upper cover plate are sealed and covered, the upper transverse diversion channel is formed at the position of the transverse diversion groove of the cover plate, and a plurality of upper longitudinal channels are respectively formed at the position of the left longitudinal groove of the cover plate, the position of the middle longitudinal groove of the cover plate and the position of the right longitudinal groove of the cover plate; the upper transverse flow channel is formed at the position of the transverse clamping groove.

6. The fully-immersed liquid-cooled battery module as claimed in claim 5, wherein the upper plate is provided with an oblique protrusion, and after the upper plate and the upper cover plate are sealed and covered, the protrusion is connected between two adjacent upper longitudinal channels, so that the two adjacent upper longitudinal channels are communicated with each other at two side edges of the protrusion.